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Apologies - I posted this a while back in the Boats topic forum, but have gotten no responses, so I've decided to hit you with it:
I don't know how to find a Thrust Bearing equivalent to the original on the Quick 540 outboard. Also, while I think about any 4mm Drive Dog could be used, what would be the same as the original?
I had a flexible shaft break at full speed and lost the prop, nut, drive dog, washer and main bearing (besides the bottom half of the shaft, of course) . I'm sure what happens is that, at high speed, there is sudden heavy drag on the prop that pulls it aft, extracting the partial shaft and everything attached.